 
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 
/**
 * MY_Router Class
 *
 * Parses URIs and determines routing
 *
 * @author      Longjianghu QQ:215241062
 * @copyright   Copyright © 2012-2013 www.spenote.com. All rights reserved.
 * @created     2012-06-21
 * @updated     2012-06-21
 * @link        http://www.spenote.com/php/codeigniter_route.html
 */
 
class MY_Router extends CI_Router
{
        // --------------------------------------------------------------------
 
        /**
         *  Set the directory name
         *
         * @access        public
         * @param        string
         * @return        void
         */
        function set_directory($dir)
        {
           //echo $dir;
        	$this->directory = $dir.'/';
        }
 
        /**
         * Validates the supplied segments.  Attempts to determine the path to
         * the controller.
         *
         * @access        private
         * @param        array
         * @return        array
         */
 
        
       
     //停用   
function _validate_request_bak($segments)
        {
        	//print_r($segments);
        	//兼容普通模
       	//$segments[1]=ucfirst($segments[1]);
            foreach($segments as $key=>&$val){
             	$val=str_replace("/", '', $val);
             }
        	if (count($segments) == 0)
                {
                        return $segments;
                }
         
                // Does the requested controller exist in the root folder?
               //print_r($segments);
               //( [0] => index [1] => login [2] => test ) 
               // echo APPPATH.'controllers/'.$segments[0].'.php';
           // echo APPPATH.'controllers/'.$segments[0].'/'.$segments[1].'/'.$segments[2].'.php';
              if (file_exists(APPPATH.'controllers/'.$segments[0].'/'.$segments[1].'.php')){
              	  //return $segments;
              }
               
                //app/controllers/xxx.php 
                if (file_exists(APPPATH.'controllers/'.$segments[0].'.php'))
                {
                    //return $segments;
                }
 
                // Is the controller in a sub-folder?
                //如果是目录
                if (is_dir(APPPATH.'controllers/'.$segments[0]))
                {
                        
                	   $temp = array('dir' => '', 'number' => 0, 'path' => '');
                        $temp['number'] = count($segments) - 1;
                        
                        for($i = 0; $i <= $temp['number']; $i++)
                        {
                                $temp['path'] .= $segments[$i].'/';
                               //home/_home/home/_home/home/index/_   循环检测是否文件夹
                                if(is_dir(APPPATH.'controllers/'.$temp['path']))
                                {
                                        $temp['dir'][] = str_replace(array('/', '.'), '', $segments[$i]);
                                }
                        }
                      /*
                       *    [dir] => Array
					        (
					            [0] => home
					        )
					
					    [number] => 2
					    [path] => home/home/index/
                       */
                       
                        $this->set_directory(implode('/', $temp['dir']));
                       // 所有数组    文件夹    过滤掉文件夹
                        $segments = array_diff($segments, $temp['dir']);
                        //取程序  index
                        $segments = array_values($segments);
                     //  print_R($segments);
                        unset($temp);
 
                        if (count($segments) > 0)
                        {
                                // Does the requested controller exist in the sub-folder?
                                if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].'.php'))
                                {
                                        if ( ! empty($this->routes['404_override']))
                                        {
                                                $x = explode('/', $this->routes['404_override']);
 
                                                $this->set_directory('');
                                                $this->set_class($x[0]);
                                                $this->set_method(isset($x[1]) ? $x[1] : 'index');
 
                                                return $x;
                                        }
                                        else
                                        {
                                                show_404($this->fetch_directory().$segments[0]);
                                        }
                                }
                        }
                        else
                        {
                                // Is the method being specified in the route?
                                if (strpos($this->default_controller, '/') !== FALSE)
                                {
                                        $x = explode('/', $this->default_controller);
 
                                        $this->set_class($x[0]);
                                        $this->set_method($x[1]);
                                }
                                else
                                {
                                        $this->set_class($this->default_controller);
                                        $this->set_method('index');
                                }
 
                                // Does the default controller exist in the sub-folder?
                                if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$this->default_controller.'.php'))
                                {
                                        $this->directory = '';
                                        return array();
                                }
 
                        }
 
                        return $segments;
                }
 
 
                // If we've gotten this far it means that the URI does not correlate to a valid
                // controller class.  We will now see if there is an override
                if ( ! empty($this->routes['404_override']))
                {
                        $x = explode('/', $this->routes['404_override']);
 
                        $this->set_class($x[0]);
                        $this->set_method(isset($x[1]) ? $x[1] : 'index');
 
                        return $x;
                }
 
 
                // Nothing else to do at this point but show a 404
                show_404($segments[0]);
        }
        
}
// END MY_Router Class
 